1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_KASAN_H 3 #define _ASM_X86_KASAN_H 4 5 #include <linux/const.h> 6 #define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL) 7 #define KASAN_SHADOW_SCALE_SHIFT 3 8 9 /* 10 * Compiler uses shadow offset assuming that addresses start 11 * from 0. Kernel addresses don't start from 0, so shadow 12 * for kernel really starts from compiler's shadow offset + 13 * 'kernel address space start' >> KASAN_SHADOW_SCALE_SHIFT 14 */ 15 #define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \ 16 ((-1UL << __VIRTUAL_MASK_SHIFT) >> \ 17 KASAN_SHADOW_SCALE_SHIFT)) 18 /* 19 * 47 bits for kernel address -> (47 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow 20 * 56 bits for kernel address -> (56 - KASAN_SHADOW_SCALE_SHIFT) bits for shadow 21 */ 22 #define KASAN_SHADOW_END (KASAN_SHADOW_START + \ 23 (1ULL << (__VIRTUAL_MASK_SHIFT - \ 24 KASAN_SHADOW_SCALE_SHIFT))) 25 26 #ifndef __ASSEMBLY__ 27 28 #ifdef CONFIG_KASAN 29 void __init kasan_early_init(void); 30 void __init kasan_init(void); 31 #else 32 static inline void kasan_early_init(void) { } 33 static inline void kasan_init(void) { } 34 #endif 35 36 #endif 37 38 #endif 39